The 14-year-old heir apparent to the throne of the Netherlands was joined by sisters Princesses Alexia and Ariane, and mother, Queen Maxima to celebrate her father, King Willem-Alexander‘s birthday.

The King recently spoke about wanting Amalia, whose official title is Her Royal Highness The Princess of Orange, Princess of the Netherlands, Princess of Orange-Nassau, to travel the world and find herself before she takes the throne when she is older.

“I hadn’t yet accepted, internalized that I would take over from my mother,” he shares in the interview. “I wanted to get to know myself better. You must first get to know yourself through and through. That’s what I am constantly emphasizing with Amalia.”

He added, “I keep saying [to her]: know your own limits. Go everywhere. Make mistakes, as far as possible out of the eyes of the public. I did that, a lot. Festivals, parties everything and more — find your boundaries. It is a good thing to do, without doing it in the public domain.”